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-rw-r--r--Documentation/networking/ipvs-sysctl.rst11
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diff --git a/Documentation/networking/ipvs-sysctl.rst b/Documentation/networking/ipvs-sysctl.rst
index 2afccc63856e..95ef56d62077 100644
--- a/Documentation/networking/ipvs-sysctl.rst
+++ b/Documentation/networking/ipvs-sysctl.rst
@@ -300,3 +300,14 @@ sync_version - INTEGER
Kernels with this sync_version entry are able to receive messages
of both version 1 and version 2 of the synchronisation protocol.
+
+run_estimation - BOOLEAN
+ 0 - disabled
+ not 0 - enabled (default)
+
+ If disabled, the estimation will be stop, and you can't see
+ any update on speed estimation data.
+
+ You can always re-enable estimation by setting this value to 1.
+ But be careful, the first estimation after re-enable is not
+ accurate.